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鑄鐵配重塊是(shi)用(yong)于增加自身重(zhong)量來保(bao)持平衡的重(zhong)物,是(shi)將噴丸機熔(rong)煉(lian)成符合 要求的液(ye)體并澆進(jin)鑄型(xing)里,經冷卻凝固、清(qing)整處理(li)后得到有預定形(xing)狀、尺寸和性能的鑄件的工藝過程(cheng)。現代機械(xie)制造工業的基(ji)礎(chu)工藝之一。
工(gong)作(zuo)面(mian)(mian)小范圍(wei)內(nei)的(de)(de)局部變化(hua)是指(zhi)加工(gong)表面(mian)(mian)不(bu)平(ping)(ping)(ping)整(zheng),有變形,灰口鐵(tie)(tie)(tie)(tie)可以看作(zuo)是鋼(gang)的(de)(de)基體與片狀石墨的(de)(de)夾雜(za)。因此石墨片越少,越細(xi),為了保證(zheng)鑄(zhu)(zhu)鐵(tie)(tie)(tie)(tie)在澆鑄(zhu)(zhu)能夠(gou)得到(dao)灰口,且不(bu)至(zhi)于得到(dao)過多和粗(cu)大的(de)(de)石墨片,這里所說的(de)(de)工(gong)作(zuo)面(mian)(mian)小范圍(wei),對小鑄(zhu)(zhu)鐵(tie)(tie)(tie)(tie)平(ping)(ping)(ping)板(ban)而(er)言是局部位置,對大鑄(zhu)(zhu)鐵(tie)(tie)(tie)(tie)平(ping)(ping)(ping)板(ban)而(er)言是局部面(mian)(mian)積。鑄(zhu)(zhu)鐵(tie)(tie)(tie)(tie)平(ping)(ping)(ping)板(ban)的(de)(de)平(ping)(ping)(ping)整(zheng)性反映了鑄(zhu)(zhu)鐵(tie)(tie)(tie)(tie)平(ping)(ping)(ping)板(ban)局部誤差(cha)鑄(zhu)(zhu)鐵(tie)(tie)(tie)(tie)平(ping)(ping)(ping)板(ban)的(de)(de)局部誤差(cha)是指(zhi)鑄(zhu)(zhu)鐵(tie)(tie)(tie)(tie)平(ping)(ping)(ping)板(ban)工(gong)作(zuo)面(mian)(mian)局部平(ping)(ping)(ping)面(mian)(mian)度加工(gong)質(zhi)量(liang),即表面(mian)(mian)粗(cu)糙(cao)度。
鑄件的精度和生產過程的經濟表現,主要取決于這道工序。在很多現代化的配重鐵車間里,造(zao)型造(zao)芯(xin)(xin)都實(shi)現(xian)了機械化或自動化。常(chang)用的砂型造(zao)型造(zao)芯(xin)(xin)設備有高、中、低壓造(zao)型機、拋(pao)砂機、無箱(xiang)射壓造(zao)型機、射芯(xin)(xin)機、冷和熱芯(xin)(xin)盒(he)機等。
叉車配重鐵(tie)(tie)(tie)工藝可(ke)分為(wei)三個基本(ben)部分,即配(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)金屬(shu)準備、鑄(zhu)型(xing)(xing)準備和鑄(zhu)件(jian)處理(li)。 配(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)金屬(shu)是(shi)指配(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)生(sheng)產中用于澆注鑄(zhu)件(jian)的金屬(shu)材料(liao),它(ta)是(shi)以(yi)(yi)一種金屬(shu)元(yuan)素為(wei)主(zhu)(zhu)要(yao)成(cheng)分,并加入其他金屬(shu)或非金屬(shu)元(yuan)素而(er)組成(cheng)的合金,習慣上稱(cheng)為(wei)配(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)合金,主(zhu)(zhu)要(yao)有鑄(zhu)鐵(tie)(tie)(tie)、鑄(zhu)鋼和配(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)有色合金。叉車(che)配(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)按造型(xing)(xing)材料(liao)的不同,又可(ke)分為(wei)兩大類(lei)(lei):一類(lei)(lei)以(yi)(yi)天然礦(kuang)產砂石作(zuo)為(wei)主(zhu)(zhu)要(yao)造型(xing)(xing)材料(liao),如熔模配(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、殼型(xing)(xing)配(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、負壓配(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、泥型(xing)(xing)配(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、實型(xing)(xing)配(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、陶瓷(ci)型(xing)(xing)配(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)等;一類(lei)(lei)以(yi)(yi)金屬(shu)作(zuo)為(wei)主(zhu)(zhu)要(yao)鑄(zhu)型(xing)(xing)材料(liao),如金屬(shu)型(xing)(xing)配(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、離心配(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、連續配(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、叉車(che)配(pei)件(jian)鐵(tie)(tie)(tie)、低壓配(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)等。
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